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- /* Copyright (c) 1993,1994, Joseph Arceneaux. All rights reserved.
-
- This file is subject to the terms of the GNU General Public License as
- published by the Free Software Foundation. A copy of this license is
- included with this software distribution in the file COPYING. If you
- do not have a copy, you may obtain a copy by writing to the Free
- Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- This software is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details. */
-
-
- /* When to make backup files. Analagous to 'version-control'
- in Emacs. */
- enum backup_mode
- {
- /* Uninitialized or indeterminate value */
- unknown,
-
- /* Never make backups. */
- none,
-
- /* Make simple backups of every file. */
- simple,
-
- /* Make numbered backups of files that already have numbered backups,
- and simple backups of the others. */
- numbered_existing,
-
- /* Make numbered backups of every file. */
- numbered
- };
-
- struct version_control_values
- {
- enum backup_mode value;
- char *name;
- };
-
- /* Determine the value of `version_control' by looking in the
- environment variable "VERSION_CONTROL". Defaults to
- numbered_existing. */
- extern enum backup_mode version_control_value ();
-
- /* Initialize information used in determining backup filenames. */
- extern void initialize_backups ();
-
- /* Make a backup copy of FILE, taking into account version-control.
- See the description at the beginning of the file for details. */
- extern void make_backup ();
-